So im tweening anchored part welded to another unanchored part and the unanchored part only moves on client side even if the script is not local. On server side part is completely still, weld is still there, but the part just wont move.
Setup (“Main” is the anchored one) :

Client Side:
Server Side:
Script:
local Ts = game:GetService("TweenService")
local Part = script.Parent
Ts:Create(Part,TweenInfo.new(5),{Position = Part.Position + Vector3.new(10,0,0)}):Play()

